49,765 Topics
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| | Hi, i have two questions about making a c++ based programming language. the first: is there a c++ function or something that can separate text by commas and parenthesis, so if i wanted to write function [I]foo[/I] with argument [I]arg1[/I] and [I]arg2[/I], i would need code to take foo(arg1,arg2) and … |
| | I am writing a program which should output some frequency shift keyed (FSK) audio. I am using a sin(...) function to find some values to plug into an array of unsigned ints which I am outputting using waveOutWrite with a sample rate of 44100 specified in the header. The values … |
| | I am trying to optimize code for Monte Carlo simulation. Even minute performance differences piles up after 100 million iterations and thus I need to squeeze every nanosecond from math operations! One area where I thought I could save a lot stems from the fact that I only require precision … |
| | [code] vector<int> vi(3); for (int i=0; i<vi.size(); i++) { cout << vi[i] << endl; } [/code] output1: 0 0 0 [code] vector<int *> vi(3); for (int i=0; i<vi.size(); i++) { cout << vi[i] << endl; } [/code] output2: 0 0 0 [code] vector<int *> vi(3); for (int i=0; i<vi.size(); i++) … |
| | int fun(int(*)()); int main() { fun(main); cout<<"in main"<<endl; return 0; } fun(int (*p)()) { cout<<"in fun"<<endl; return 0; } the output is.... in fun in main how and in which manner is "main" being passed in the fun function argument in main function. does this way of passing automatically mean … |
| | For some reason, I can't even get a simple "Hello World" to print out in terminal. I'm using Borland C++ Builder 6. The Form1 window comes up but nothing is written in it. No errors, just a blank page. |
| | hi frndz... here's a very small doubt that's been lingering for a while... what is the meaning of finding an algorithm for a certain problem in constant space?? i dont understand the meaning of constant space, does it mean that no temporary variable can be created? for ex:here's a question... … |
| | Long story sort, I'm making a thread in c++ that starts a timer. When a user starts playing the game, it starts the thread, and when user logs out - thread stops. - thus giving me the total time played. Problem: When using the code to start the thread - …  |
| | Hi, I have two directories and each directory has a *.cpp and *.h and a Makefile. I am also creating an instance of the class of program1(in one directory) in program2(in other directory). I have a main Makefile that makes the two makefiles in each directory. i am getting the … |
| | I am trying to determine if a word is a palindrome or not using queues, but I am receiving the wrong results. I have tried several things to get it to work using the boolean variable isPalin. Will someone lead me to the right direction please? I have been trying …  |
| | I know it's a lot of code but any help anyone can give would be amazing. Basically when I re-write out to the binary file it must not be working because when I try to print it it only prints the record I updated. [code] void updateRecord() { int key; … |
| | When i run the program using g++ 4.3, i am getting a segmentation fault. After, checking with gdb, i am getting the segmentation fault on line 79. The program is k-way merging. Any help is welcome. Thanks. The code is: [CODE] #include <iostream> #include <fstream> #include <string> using namespace std; …  |
| | I don't know how to properly override this function when it comes to an Iterator for a linked list. [CODE] ListIterator operator++(){ currentPtr->prev=currentPtr; currentPtr=currentPtr->next; currentPtr->next=currentPtr->next->next; return *this; } // advance iterator to the next list node; return value is iterator *after* advancing ListIterator operator--(){ currentPtr->next=currentPtr; currentPtr=currentPtr->prev; currentPtr->prev=currentPtr->prev->prev; return *this; } … |
| | Hello there~ Well, straight for the problem: I have a class with a private vector that stores pointers: [code]class MyClass{ private: vector<myOtherCls*> myVector; public: //using the following till now: vector<myOtherCls*>& getContainer(); };[/code] [code]class myOtherCls{ public: void someGetFunc(); };[/code] Now I dont want to use [icode]getContainer()[/icode] but rather he Subscript-Operator. [code]MyClass … |
| | Problem: Write a program that calculates the average of a group of test scores, where the lowest score in the group is dropped. It should use the following functions: `void getScore()` should ask the user for a test score, store it in a reference parameter variable, and validate it. This … |
| | hello, my problem is: i have a function that i pass a pointer to so that it can update a variable for me. when this function is called normally the variable updates and everything works fine. BUT when i call this function *as a seperate thread*, and pass it the … |
| | I have a problem when handling the txt file in C++. My code is like this, and the test.txt file is in the attachment. there are two functions: [LIST=1] [*]int txtnum(ifstream& input, char* filename ) is to count the amount of numbers list in the txt file. [*]long filesize( ifstream& …  |
| | Can someone help me with this problem... A is an m*n matrix B is an n*p matrix product AB is an m*p then I have to write a function void matrix product that takes two matrices of integers as two separate arguments and then calculates the product of those matrices … |
| | hello all, my problem that i can't get the language id that has been active in this time using c++ please can any one help me in that thank you |
| | help me in listing file names inside directory by using a simple code in c++ that a beginner can understand |
| | can someone help me with this problem(factorial) everything is working fine but when I enter a negative number the program crashes somewhere....but n can be any non-negative number Here is da code #include <iostream> #include <string> using namespace std; int fact(int n){ if (n==0) return 1; else return fact(n-1)*n; } …  |
 | Hey,everyone.. pls I need a very exhaustive example of a typical linked list for better understanding .Any help will be appreciated..Thanks |
| | why when I run it ....the output of the "if" statements doesn't come up ...Im trying to see if theres any erros but I just cant find anything please any help I would appreciated [CODE] include <iostream> #include<iomanip> using namespace std; int main() { char size; cout<<"******************Welcome to M&D Pizza … |
| | I have the following code that tests a string to see if it is a palindrome. The only error I am getting is when I try to pass each character to the queue and stack. Is there another way to pass it to each? [CODE]//Implement the palindrome-recognition algotithm described in … |
| | I have been looking for something to make it click in my head on how to get the average of my array and I need help. [CODE]#include <iostream> #include <math.h> using namespace std; int grades[10],a,total; double average; void main(){ cout << "Enter 10 test grades to average:" <<endl <<endl; for … |
| | while syntactically templates cannot be virtual functions, I wonder what approach to use when semantically this is what someone wants to do. for example, in my case I want to have a virtual function, because I'm using sub-classes while having a pointer to the base class, but I also want … |
| | Hi, I got problem with Interprocess communication in MFC I am using vs2003 I have got project using named pipes. It seems to be perfect, However, When client want to create the file it always fails the pseudo code Server - Create Named Pipe - Read File Client - Create … |
 | Hello Everybody, IS there anyone in this forum who have worked on Elliptic curve cryptosystem/cryptograpgy? I want to discuss something regarding ECDSA, i have perfectly implemented ECDH and have a problem in implementing ECDSA. Regards! |
| | Hey guys, Im still new to programming and need help with something. I need to read a line of numbers from a text file into an array. I will be given this in a text file and need to store them in an array for later use. 0 1 2 … |
| | Can someone please copy/paste the following source and look at the error message? I am receiving too few arguements to function error. Please help! //preprocessor directive #include<iostream> #include<fstream> #include<iomanip> using namespace std; //global variables/constants, function prototypes void headerfn(); // void fn without parameters void namefn(string fname, string lname); // void … |
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